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Method for periodically and dynamically calibrating airborne meteorological radar noise

An airborne weather radar, dynamic calibration technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as large system noise deviation, reduce false alarm rate, eliminate the influence of noise, and ensure the effect of detection sensitivity

Active Publication Date: 2018-11-16
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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Problems solved by technology

Through this method, the problem of false alarm caused by large system noise deviation is better solved

Method used

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  • Method for periodically and dynamically calibrating airborne meteorological radar noise
  • Method for periodically and dynamically calibrating airborne meteorological radar noise
  • Method for periodically and dynamically calibrating airborne meteorological radar noise

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[0044] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below ...

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Abstract

The invention provides a method for periodically and dynamically calibrating airborne meteorological radar noise and belongs to the technical field of meteorological radar noise processing. The methodcomprises steps of turning off a radiation switch when the radar scanning commutation starts; turning on the radiation switch when the radar scanning commutation ends; obtaining an average value of radar power data sampled during a period from turning off the radiation switch to turning on the radiation switch as a calibration noise value; and calibrating the airborne meteorological radar noise by using the calibration noise value. The periodic noise calibration method can accurately acquire the noise information of the current environment of the meteorological radar without affecting the normal operation of the radar, accurately eliminates the influence of noise according to a noise calibration result, and reduces a false alarm rate while ensuring detection sensitivity.

Description

technical field [0001] The invention belongs to the technical field of weather radar noise processing, and in particular relates to a method for dynamically calibrating airborne weather radar noise periods. Background technique [0002] In the field of radar detection, weather radar echo data is usually affected by system thermal noise and external environmental noise. The thermal noise is mainly the interference generated by the active components of the radar itself, and the environmental noise is mainly caused by the work and operation of other airborne equipment except the radar. The interference generated by the external atmospheric environment, thermal noise and environmental noise are collectively referred to as noise in this paper. [0003] Noise will affect the radar's detection of targets to a certain extent. The detection threshold (red, yellow, and green intensity levels) of weather radars takes the target echo power into account in the reflectivity factor Z e Th...

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Application Information

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IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 董宇航孟子塬管力
Owner LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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